Question: Who was the spouse of Rudolph Valentino on January 1st, 1923?
Paraphrase: Regarding the relationship of Rudolph Valentino on January 1st, 1923, who was his spouse?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q188692 p:P26 ?s . ?s ps:P26 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1923')) }